Математика 2 года назад Zhorik99

27:(31 3/7х-2 11/14х)=1 1/8

Ответ

Svet1ana

$<var>27:(31\frac{3}{7x}-2\frac{11}{14x})=1\frac{1}{8} </var>$

$<var>31\frac{3}{7x}-2\frac{11}{14x}=27:1\frac{1}{8} </var>$

$<var>\frac{220}{7x}-\frac{39}{14x}=27:\frac{9}{8} </var>$

$<var>\frac{440-39}{14x}=27\cdot\frac{8}{9} </var>$

$<var>\frac{401}{14x}=24 </var>$

$<var>14x=\frac{401}{24}</var>$

$<var>x=\frac{401}{24}:14=\frac{401}{24}\cdot\frac{1}{14}=\frac{401}{336}=1\frac{65}{336}</var>$